System Administrator, Senior
Confirmed on the employer's own hiring board on Oct 27, 2026. First seen by Alion on Jun 10, 2026. Parsons scores B on the Alion truth index.
Job Description:
Parsons is the premier national security and critical infrastructure solutions provider. We have unparalleled tactical-to-strategic level experience in securing the platform and operational technology of National Security Systems - a mission at the heart of our intersecting work across defense, intelligence, and critical infrastructure.
We deliver value through scalable, fast, disruptive solutions to our customers’ most complex national security and critical infrastructure challenges.
We provide deep domain expertise to develop solutions both for now and for the future.
We apply our exceptional technology capabilities to stay ahead of the competition and our customers’ needs.
We layer and integrate solutions to provide unmatched innovation.
Our National Security Solutions team needs a Sr. System Administrator to support our expanding portfolio of work in the Intelligence Community (IC). As a collaborative member of a small and mostly autonomous team, this position directly supports secure enclave development networks.
Core Tasks:
Conduct functional and connectivity testing to ensure continuing operability.
Develop and document systems administration standard operating procedures.
Maintain baseline system security according to organizational policies.
Manage accounts, network rights, and access to systems and equipment.
Plan, execute, and verify data redundancy and system recovery procedures.
Install, update, and troubleshoot systems and servers.
Comply with organization systems administration standard operating procedures.
Implement and enforce local network usage policies and procedures.
Manage system and server resources including performance, capacity, availability, serviceability, and recoverability.
Monitor and maintain system and server configurations.
Perform repairs on faulty system and server hardware.
Troubleshoot hardware/software interface and interoperability problems.
Required:
Bachelor’s degree in a technical discipline and 15 years’ experience as a System Administrator, OR High school diploma and 20 years’ experience as a System Administrator
Experience with Windows Sever Administration, Active Directory, and Group Policy
Familiarity with Linux Server Administration
Familiarity with VMware/ESXi, VMWare Virtual Networking, and VMware vCenter
Networking Switching and Router Management
Storage Management (NetApp)
Hardware and Operating System troubleshooting
System hardening
Security Compliance Scanning (Nessus, ACAS)
Understanding of project design within the scope of security (RMF) requirements
Active TS/SCI security clearance with polygraph
Active DoD IAT Level II certification (e.g. CCNA-Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP)
Ability to demonstrate cyber/IT related experience with attention to detail, customer service, oral and written communication, and problem solving.
Security Clearance Requirement:
An active Top Secret SCI w/Polygraph security clearance is required for this position.This position is part of our Federal Solutions team.The Federal Solutions segment delivers resources to our US government customers that ensure the success of missions around the globe. Our intelligent employees drive the state of the art as they provide services and solutions in the areas of defense, security, intelligence, infrastructure, and environmental. We promote a culture of excellence and close-knit teams that take pride in delivering, protecting, and sustaining our nation's most critical assets, from Earth to cyberspace. Throughout the company, our people are anticipating what’s next to deliver the solutions our customers need now.Salary Range: $148,300.00 - $266,900.00We value our employees and want our employees to take care of their overall wellbeing, which is why we offer best-in-class benefits such as medical, dental, vision, paid time off, 401(k), life insurance, flexible work schedules, and holidays to fit your busy lifestyle!Parsons is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status or any other protected status.We truly invest and care about our employee’s wellbeing and provide endless growth opportunities as the sky is the limit, so aim for the stars! Imagine next and join the Parsons quest-APPLY TODAY!Parsons is aware of fraudulent recruitment practices. To learn more about recruitment fraud and how to report it, please refer to https://www.parsons.com/fraudulent-recruitment/.